Column separators not visible in file browsing windows

Description

In filezilla 3.2.2.1 x86-64-pclinux-gnu build date 20090227 compiled with gcc 4.3.3 with flags -g -O2 -Wall -g -fexceptions from the ubuntu repos, the two filebrowsing windows' column bars, those draggable bars to reveal more or less of the file name, modification date, filesize, filetype etc are not visible. I can still mouse over where they should be and click and drag them to reveal more or less of a filename though.